*Excludes Observations that spanned multiple years

Pre 19703
19700
19711
19720
19731
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19874
198811
19893
19901
19915
19925
199333
19944
19956
19963
19970
19980
199933
200029
200128
20021
20030
20043
20051
20062
20072
20087
20095
20101
20111
20121
20130
20141
20150
20160
20170
20180
20193
20201
20211
20220
20231
20241
Total203